probably really dumb question but how can i be 100% sure i'm trans? i think i want to transition but sometimes i have conflicting feelings on how much i really dislike being male (my agab) and it keeps me questioning. i think i like being a girl though, i get such out of nowhere happiness when i look like a girl in the mirror. it's ok if you don't want to discuss this. sorry
Honestly? You can never be 100% sure of anything, not even that your mother is your real mother.
Personally, I think that if you feel dysphoria, and that you'd want to become the opposite gender (either by presenting more fem, medically transitioning, having surgeries, etc...) you're already trans. You already feel like a girl, or at least you feel like that's right.
Most HRT changes are reversible until 3 months in, so you could always try it out and see how you feel on them, the mental effects are instant!
Also, you can always DM me on Discord if you need to discuss this further. I'm always open.
Finally, these types of questions are exactly the reason why I opened this webpage. I invite you to read the FAQ in https://gumi.gay , you might find some enlightment.
Good luck.